A bus master for a bus for connection of sensors andor an ignition means device, which has at least two bus driver arrangements allowing data to be received independently of one another. In particular, isolated nucleic acid molecules are provided encoding a synthetic interferon polypeptide, called Synferon. The mount is capable of pivoting to a number of testing positions. A metal is deposited on the wafer which fills the vias wherein the metal depositing is initiated at a substantially same time as heating the wafer from the first temperature. According to the above arrangement, it has become possible to increase a margin of the active matrix substrate for the static electricity and improve the production yield without increasing the number of the producing steps.